P0015
1UR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0014: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1)
DTC P0014 - Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1)
DTC P0015 - Camshaft Position "B" - Timing Over-Retarded (Bank 1)
DTC P0024 - Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 2)
DTC P0025 - Camshaft Position "B" - Timing Over-Retarded (Bank 2)
DESCRIPTION
This DTC is designed to detect opens or shorts in the camshaft oil control valve (OCV) circuit. If the OCV's duty-cycle is excessively high or low while the engine is running, the ECM will illuminate the MIL and set the DTC.
The Variable Valve Timing (VVT) system adjusts the exhaust valve timing to improve the driveability. The engine oil pressure turns the camshaft actuator to adjust the valve timing. The OCV is a solenoid valve and switches the engine oil line. The valve moves when the ECM applies the 12 volts to the solenoid. The ECM changes the energizing time to the solenoid (duty-cycle) in accordance with the camshaft position, crankshaft position, throttle position, etc.
MONITOR DESCRIPTION
The ECM optimizes the exhaust valve timing using the VVT (Variable Valve Timing) system to control the exhaust camshaft. The VVT system includes the ECM, the Oil Control Valve (OCV) and the VVT controller.
The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the exhaust camshaft.
If the difference between the target and actual exhaust valve timing is large, and changes in actual exhaust valve timing are small, the ECM interprets this as the VVT controller stuck malfunction and sets a DTC.
Example:
A DTC is set when the following condition is met for 10 seconds or more:
The difference between the target and actual exhaust valve timing is more than 5°CA (Crankshaft Angle) and the condition continues for more than 5 seconds.
DTCs P0014 and P0024 (Advanced Cam Timing) are subject to 2 trip detection logic.
DTCs P0015 and P0025 (Retarded Cam Timing) are subject to 1 trip detection logic.
These DTCs indicate that the VVT controller cannot operate properly due to OCV malfunctions or the presence of foreign objects in the OCV.
The monitor will not run unless the following conditions are met:
- The engine is warm (the engine coolant temperature is 75°C [167°F] or more).
- The vehicle has been driven at more than 40 mph (64 km/h) for 3 minutes.
- The engine has idled for 3 minutes (retarded angle side only).
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
Advanced camshaft timing:
Retarded camshaft timing:
WIRING DIAGRAM
INSPECTION PROCEDURE
- If DTC P0014 or P0015 is displayed, check the bank 1 VVT system for exhaust side circuit.
- Bank 1 refers to the bank that includes No. 1 cylinder.
- If DTC P0024 or P0025 is displayed, check the bank 2 VVT system for exhaust side circuit.
- Bank 2 refers to the bank that does not include No. 1 cylinder.
- Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014, P0015, P0024 OR P0025)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG) and turn the Techstream ON.
(c) Enter the following menus: Powertrain / Engine / Trouble Codes.
(d) Read DTCs.
Result:
HINT: If any DTCs other than P0014, P0015, P0024 or P0025 are output, troubleshoot those DTCs first.
B -- GO TO DTC CHART SFI System
A -- Continue to next step.
2. PERFORM ACTIVE TEST USING TECHSTREAM (OCV FOR EXHAUST SIDE OPERATION)
(a) Connect the Techstream to the DLC3.
(b) Start the engine and turn the Techstream ON.
(c) Warm up the engine.
(d) Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank1) or Control the VVT Exhaust Linear (Bank2).
(e) Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream.
OK:
NG -- CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)
OK -- Continue to next step.
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0014, P0015, P0024 OR P0025)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG) and turn the Techstream ON.
(c) Clear DTCs DTC Check / Clear.
(d) Start the engine and warm it up.
(e) Switch the ECM from normal mode to check mode using the Techstream Check Mode Procedure.
(f) With the engine warmed up, idle it for 1 minute. Then drive the vehicle for 5 minutes.
(g) Read DTCs using the Techstream.
OK:
No DTC output.
OK -- END
NG -- Continue to next step.
4. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) P0016
NG -- ADJUST VALVE TIMING
OK -- Continue to next step.
5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
(a) Remove the OCV Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Apply the positive battery voltage to terminal 1 and negative battery voltage to terminal 2. Check the valve operation.
OK:
Valve moves quickly.
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
OK -- Continue to next step.
6. INSPECT OIL CONTROL VALVE FILTER
(a) Remove the cylinder head cover sub-assembly Disassembly.
(b) Remove the OCV filter Disassembly.
(c) Inspect the OCV filter.
OK:
Filter is not clogged.
NG -- REPLACE OIL CONTROL VALVE FILTER
OK -- Continue to next step.
7. REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY
(a) Replace the camshaft timing exhaust gear assembly Removal.
NEXT -- Continue to next step.
8. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG) and turn the Techstream ON.
(c) Clear DTCs DTC Check / Clear.
(d) Start the engine and warm up.
(e) Switch the ECM from normal mode to check mode using the Techstream Check Mode Procedure.
(f) With the engine warmed up, idle it for 1 minute. Then drive the vehicle for 5 minutes.
(g) Read output DTCs using the Techstream.
OK:
No DTC output.
HINT: DTC P0014, P0015, P0024 or P0025 is output when foreign objects in engine oil are caught in some parts of the system. These codes will stay registered even if the system returns to normal after a short time. These foreign objects are then captured by the oil, thus eliminating the source of the problem.
OK -- SYSTEM OK
NG -- REPLACE ECM